Demonry refers to the activities, behavior, or practice of demons. It is an uncommon word and may be difficult to find synonyms for. However, some possible alternatives to demonry include demonology, demonic behavior, infernal machinations, diabolism, and evil spirits. Other words that could be associated with demonry include abyss, hellfire, evilness, malevolence, and devilry. While these words may not be exact synonyms for demonry, they can be used in a similar context to describe evil or malevolent behavior. Overall, demonry is a unique and interesting word that adds a certain level of intrigue and depth when discussing supernatural subjects.